JP3841037B2 - Shallow bottom container type anticorrosion structure and method of attaching the same to prevent corrosion of reinforcing bars in reinforced concrete - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shallow container-like electric protection structure for electrically protecting a reinforcing bar in a reinforced concrete, a method for attaching a shallow container-like electric protection structure filled with an electrolyte to a reinforced concrete, and the shallow container-like electric protection structure. The present invention relates to a method for preventing corrosion of reinforced concrete using a body.
[0002]
[Prior art]
Reinforcing bars in reinforced concrete may corrode with the neutralization of concrete and increase in salinity, which may reduce the function of the reinforced concrete structure. For example, the salt concentration in reinforced concrete may increase or the concrete may become neutral due to changes in seawater, waves, and temperature in the coastal and marine environment. As a method for preventing corrosion of a reinforced concrete structure placed in such an environment, there is an electric protection. This is achieved by passing a direct current from the anode to the reinforcing steel in the reinforced concrete through the concrete to make the surface of the reinforcing steel inert to corrosion.
[0003]
For example, as shown in FIG. 11, after fixing a joining member 2 and an anode 3 to a structure made of reinforced concrete 1, an electrolyte (also referred to as backfill) 5 is filled in a support container 4 having an opening. The support container 4 filled with 5 is joined by pressing the support container 4 against the reinforced concrete 1 so that the flange 6 of the joining member 2 engages with the hole 7 provided in the side wall of the support container 4. 3, a support container 4 filled with electrolyte 5 is attached to the surface of the reinforced concrete structure made of reinforced concrete 1, the anode 3 is connected to the positive pole of the power source, and the reinforcing bar 8 inside the reinforced concrete is electrically connected to the negative pole. A method is known in which the reinforcing bars 8 in the reinforced concrete 1 are jointed to thereby prevent corrosion of the reinforcing bars 8 (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. Sho 62-188784
[Problems to be solved by the present invention]
However, in general, as shown in FIG. 11, a thin reinforcing bar 9 embedded in the reinforced concrete is exposed on the surface of the reinforced concrete 1, and the thin reinforcing bar 9 protruding on the surface of the concrete is an anode. 3 may be short-circuited due to contact with 3 and a sufficient anticorrosion effect may not be obtained.
Therefore, before fixing the joining member 2 and the anode 3 to the reinforced concrete 1, it is usually necessary to search for and remove a slight thin reinforcing bar 9 protruding from the concrete surface and apply an overlay. To remove the reinforcing bars 9 and apply the overlay, a great amount of labor is required, which increases the cost.
In addition, since the anticorrosion current decreases as the distance from the power source increases due to the electrical resistance of the anode 3, there is a problem that the anticorrosion becomes uneven depending on the location. In order to solve this problem, wiring for distributing current to the anode 3 ( (Not shown) had to be added.
Furthermore, since the conventional support container 4 is previously attached to the reinforced concrete after the support container 4 is filled with the electrolyte 5, it is difficult to attach the support container 4 filled with the heavy electrolyte 5 to the reinforced concrete. It took heavy labor and skill to attach the support container 4 filled with the heavy electrolyte 5 to the downward surface of the reinforced concrete.
[0006]
[Means for Solving the Problems]
Therefore, the present inventors conducted research to solve these problems,
(A) As shown in the perspective view of FIG. 1, the insulator frame (hereinafter referred to as an insulator frame) 10 made of an insulating material and the single-side opening portion of the insulator frame are attached. A shallow shallow container-like anticorrosion structure 13 having a shallow shallow container shape comprising a corrosion-resistant conductive plate (hereinafter referred to as a conductive plate) 11 and an anode portion 14 attached to the inside of the conductive plate 11 is manufactured. The shallow shallow container-like anticorrosion structure 13 is attached in advance to the surface of the reinforced concrete as shown in the cross-sectional view of FIG. 2, and the space formed by the shallow shallow container-like anticorrosion structure 13 and the surface of the reinforced concrete 1 is formed. the electrolyte 21 is injected from the electrolyte injection opening 19, the conductive plate 11 to the positive pole and connecting each rebar 8 in reinforced concrete 1 in the negative electrode, the bottom shallow container shape sacrificial structure itself lighter The bottom shallow container shape sacrificial structure 13 since it is can be mounted relatively easily on the surface of the reinforced concrete 1, can thus be sacrificial reinforced concrete by a simple operation,
(B) Since the conductive plate 11 of the shallow container-like cathodic protection structure attached in this manner is fixed to the reinforced concrete surface via the insulator frame 10, the conductive plate and the anode portion are reinforced concrete surfaces. Even if there is a thin reinforcing bar that is fixed away from it and the reinforcing bar is exposed from the surface of the reinforced concrete, there is no short circuit with the conductive plate and the anode part,
(C) The surface of the reinforced concrete is not smooth and generally has a rough surface. On the other hand, the insulator frame of the shallow container-like cathodic protection structure is made of a rigid synthetic resin. poor toughness, therefore, can not be avoided that a gap between the insulator frame and reinforced concrete surface, if there is such a gap, from where the electrolyte to be described later is not preferable because leaking from the gap, according to (a) As shown in FIG. 3, an elastic seal layer 15 made of an elastic body such as polyurethane, polyethylene, chloroprene, silicon or the like, or polystyrene foam is formed on one surface of the insulator frame in the shallow container-like anticorrosion structure. Research results such as more preferable to do so were obtained.
[0007]
The present invention has been made based on such research results, and as shown in FIG. 1 and FIG.
(1) It comprises an insulator frame 10 made of an insulating material, and a corrosion-resistant conductive plate 11 attached so as to close the opening on one side of the insulator frame 10, and further provided with an electrolyte injection port 19. A shallow shallow container-like anticorrosion structure for anticorrosion of reinforcing bars in reinforced concrete having an anode part attached to the inside of the conductive plate,
(2) and the insulator frame 10, of the insulator frame 10 consists mounted conductive plate 11 Metropolitan so as to close the one side opening, further and electrolyte injection hole 19 is provided, of the conductive plate 11 On the other hand, the anode portion 14 is joined. On the other hand, the reinforcing bars in the reinforced concrete formed by interposing the elastic seal layer 15 made of an elastic body on the reinforced concrete mounting surface side of the insulator frame 10 that opposes the conductive plate are anticorrosive. This is characterized by a shallow shallow container-shaped anticorrosion structure for the purpose of the above.
[0008]
It is preferable that the insulator frame 10 constituting the bottom shallow container-shaped anticorrosion structure 13 for the anticorrosion of the reinforcing bars in the reinforced concrete of the present invention is made of a lightweight and highly insulating material, and thus is made of a synthetic resin. Most preferred.
Further, the conductive plate 11 constituting the shallow shallow container-shaped anticorrosion structure 13 is made of a material having high strength, corrosion resistance to an environment containing salt, sulfurous acid gas, and the like, and lightweight. Preferably, carbon, titanium clad plate, carbon fiber plate, titanium or titanium alloy plate can be considered as such material. Among these, titanium or titanium alloy plate is most preferable. The titanium or titanium alloy plate preferably has a width of 50 to 1000 mm, a length of 200 to 2000 mm, and a thickness of 0.1 to 2 mm. This is because, if the titanium or titanium alloy plate is too large, it is difficult to attach the shallow shallow container-shaped anticorrosion structure 13 to the reinforced concrete.
[0009]
In order to produce the shallow bottom container-shaped cathodic protection structure 13 by attaching the conductive plate 11 to the insulator frame 10, the conductive plate 11 may be bonded to the insulator frame 10 with an adhesive. The insulator frame 10 is preferably reduced in weight by reducing the cross-sectional area as much as possible, but if the cross-sectional area of the insulator frame is reduced, the strength is insufficient, and the strength of the shallow container-like cathodic protection structure 13 is insufficient. There are cases. In such a case, in order to further improve the strength of the shallow container-like cathodic protection structure 13, as shown in FIG. 4, the edge of the conductive plate 11 is bent to form a bent edge 34. When the conductive plate 11 is joined to the insulator frame 10 so as to surround the insulator frame 10 with the bent edge 34, the bonding strength between the insulator frame 10 and the conductive plate 11 can be further increased, and the shallow container-like cathodic protection. The strength of the entire structure 13 can be further increased.
Further, when the insulator frame 10 is injection-molded, it can be integrally formed by casting the conductive plate 11. Further, the electrically conductive plate 11 may be assembled to the insulator frame 10 at the work site to complete the shallow container-like cathodic protection structure 13.
[0010]
Further, as shown in the partial cross-sectional perspective view of FIG. 10, the frame of the bottom shallow container-shaped anticorrosion structure 13 is formed by bending the periphery of a corrosion-resistant conductive plate, The conductive plate and the frame can be integrally formed. The conductor frame 33 can be further reduced in weight as compared with the insulator frame 10. However, in this case, since the conductor frame 33 is conductive, in order to keep the reinforced concrete 1 and the conductor frame 33 in an insulated state, it is necessary to provide an insulating layer 31 made of an insulator on the side of the conductor frame 33 where the reinforced concrete is attached. There is.
Therefore, the present invention
(3) The conductive plate 11 having corrosion resistance, the conductor frame 33 formed by bending the periphery of the conductive plate having corrosion resistance, and the insulating layer 31 provided on the reinforced concrete mounting side surface of the conductor frame 33 Further comprising an electrolyte inlet 19, and a shallow shallow container-shaped electro-corrosion-proof structure for electro-corrosion of reinforcing steel in reinforced concrete having an anode portion 14 attached to the inside of the conductive plate 11 having corrosion resistance, It has the characteristics.
The insulating layer 31 can be replaced with an insulating elastic seal layer made of an insulating elastic body. The elastic seal layer 15 made of an elastic body attached to the reinforced concrete mounting surface side of the insulator frame 10 described in (2) may be formed of either a conductor or an insulator. The insulating layer 31 in the shallow shallow container-shaped anticorrosive structure described above has an insulating elastic seal layer made of an insulating elastic body such as polyurethane and polyethylene having particularly excellent insulating properties since the frame 33 is made of a conductor. It is necessary to configure with.
[0011]
The conductive plate 11 made of titanium or a titanium alloy plate is lightweight and has high strength, but if left for a long period of time, a thin titanium oxide film is formed on the surface and the conductivity gradually decreases. Therefore, the anode part 14 is attached to the surface of the conductive plate 11 made of titanium or a titanium alloy plate. As shown in FIG. 1, the anode portion 14 is directly coated with a film capable of maintaining high conductivity for a long time, such as a platinum group metal plating film such as platinum, a noble metal oxide (MMO) film, or a carbon film, on the conductive plate 11. Can be installed by forming. However, the cost of a conductive plate in which the entire surface of the titanium or titanium alloy plate is plated with platinum is greatly increased. Therefore, a rod of titanium or titanium alloy plated with a platinum group metal is prepared, bent into a handle shape, and the bent titanium or titanium alloy rod is plated with a platinum group metal. It is preferable that the anode portion 14 made of is welded and attached to the conductive plate 11 as shown in FIG. The anode part 14 is not limited to the bending rod shown in FIG. 1, but may be a band, a straight bar, a net, a ring or the like formed with a platinum group metal plating film, a noble metal oxide (MMO) film, etc. Is preferably made of a band having dimensions of width: 2 to 50 mm × thickness: 0.3 to 3 mm, a rod having a diameter of 3 to 20 mm, or a net having a diameter of 0.5 to 5 mm. The anode part which consists of a strip | belt shaped object produced with the strip | belt is shown in FIG. The anode portion 14 made of a strip-like body can increase the surface area relative to the cross-sectional area, and further, as shown in FIG. 9, a coating 29 made of platinum group metal plating, noble metal oxide (MMO) or the like is provided on one side. Since it can be formed and an active surface can be provided widely only in the reinforcing bar direction, it is more advantageous than an anode portion made of a rod-shaped body.
In FIG. 1, a conductive plate 11 is formed of a platinum film, a noble metal oxide film or a carbon film, and an anode portion 14 and a rod formed by coating a titanium or titanium alloy rod with a platinum group metal plating film or a noble metal oxide film. FIG. 10 shows an anode part 14 made of a strip-like body formed by coating a titanium or titanium alloy rod with a platinum group metal plating film or a noble metal oxide film. Although it is attached, it is sufficient that the anode part 14 attached to the conductive plate 11 is provided with any one of an anode part made of a film, an anode part made of a rod-like body, and an anode part made of a strip-like body. .
[0012]
Next, a method for attaching the shallow shallow container-shaped anticorrosion structure described in (1) to (3) to reinforced concrete will be described.
First, as shown in FIG. 1, holes 16 are made in advance in the insulator frame 10. The hole 16 may be opened immediately before mounting, but is preferably opened in advance.
Holes 12 are also formed in the reinforced concrete where the shallow shallow container-like anticorrosion structure is to be attached, and fixtures are attached to the holes 16 provided in the insulator frame of the shallow shallow container-like cathodic protection structure 13 and the reinforced concrete holes 12. It is fixed to the reinforced concrete 1 by being inserted, and the bottom shallow container-like cathodic protection structure 13 is attached. As the fixture, synthetic resin, titanium, a titanium alloy or stainless steel wood screw, an all anchor, or the like can be used. Among these fixtures, it is most preferable to use a wood screw 17 made of titanium or a titanium alloy from the viewpoint of strength and corrosion resistance.
The plug 28 is set in the hole 12 of the reinforced concrete, the wood screw 17 is inserted into the hole 16 opened in the insulator frame 10, and the insulator frame 10 is fixed to the reinforced concrete 1 by the wood screw 17 to form a shallow container-like cathodic protection structure. A cross-sectional view with the body 13 attached is shown in FIG. In the case of a titanium screw made of titanium or a titanium alloy, an insulating washer 18 is inserted into the wooden screw 17 so that the reinforcing bar 8 and the conductive plate 11 in the reinforced concrete 1 are kept in an insulating state, and then the wooden screw 17 is tightened. There is a need.
The shallow container-like cathodic protection structure described in the above (1) and (2) having the insulator frame 10 has been described above, but the periphery of the conductive plate having corrosion resistance shown in FIG. 10 is formed by bending. In the same manner, the shallow shallow container-shaped anticorrosion structure having the conductor frame 33 described above can be attached to the reinforced concrete.
[0013]
After the bottom shallow container-shaped anticorrosion structure 13 is attached to the reinforced concrete 1, it is necessary to inject the electrolyte into the space formed by the bottom shallow container-shaped anticorrosion structure 13 and the reinforced concrete 1. As shown in FIGS. 1 to 4, the conductive plate 11 is formed in advance, and a connecting tool 24 to which an electrolyte injection hose 20 can be connected is attached to the electrolyte injection port 19. Any method may be used for attaching the connection tool 24, and it is not particularly limited. However, it is preferable that a screw groove is formed on the inner surface of the electrolyte injection port 19 and the connection tool 24 is screwed in and attached. The connection tool 24 is provided with a slit 25, and a slide plate 26 can be inserted into the slit 25.
In this way, after attaching the bottom shallow container-shaped anticorrosion structure 13 to the reinforced concrete, the connection tool 24 is screwed into the electrolyte injection port 19 provided in the conductive plate 11, and the electrolyte is injected into the connection tool 24. As shown in FIG. 2, the hose 20 is fitted and an infusion pump or the like is used to form the electrolyte 21 with the reinforced concrete surface and the conductive plate 11 and the insulator frame 10 of the shallow shallow container-like cathodic protection structure. 22, the electrolyte 21 is injected and filled, and after the injection and filling of the electrolyte 21 is completed, the supply of the electrolyte 21 is stopped, and the slide plate 26 is inserted into the slit 25 provided in the connector 24, so that the electrolyte 21 flows out. Then, the electrolyte injection hose 20 is removed from the connector 24, and the mounting operation of the bottom shallow container-shaped cathodic protection structure filled with the electrolyte is completed.
[0014]
The electrolyte inlet can be provided in the conductive plate 11 as shown in FIGS. 1 to 4, but the electrolyte inlet can be the insulator frame 10 or the conductor as shown in FIGS. 5 to 8 and 10. It can be provided on the frame 33. In this case, a cutout opening 35 penetrating from the inside to the outside is formed in the insulator frame 10 or the conductor frame 33, and the cutout opening 35 is formed in a structure closed by a shrinkable sponge-like elastic body 27. The cutout opening 35 of the conductor frame 33 formed by bending the conductive plate 11 preferably closes the internal space of the conductor frame 33 with the sill plate 32. 5-8 and FIG. 10, when the electrolyte injection method employ | adopts the bottom of the container-like cathodic protection structure 13 attached to the reinforced concrete 1, first, as shown in FIG. The injection nozzle 30 is inserted along the surface of the reinforced concrete. Since the injection nozzle 30 is hard, but the sponge-like elastic body 27 can contract, when the injection nozzle 30 is inserted along the surface of the reinforced concrete, the sponge-like elastic body 27 contracts and injects as shown in FIG. The tip of the nozzle 30 pushes the sponge-like elastic body 27 and is inserted. When the electrolyte 21 is injected and the injection nozzle 30 is pulled out after the electrolyte 21 is filled in this state, the sponge-like elastic body 27 swells and closes the cut-out port 35 again. It is held in a space composed of reinforced concrete.
[0015]
It is preferable to provide a gas vent 23 at a position opposite to the electrolyte inlet 19 provided in the conductive plate 11. When the space 22 is filled with the electrolyte 21, the degassing pores 23 act to let the air in the space 22 escape to the outside of the shallow container-like cathodic protection structure. Furthermore, it is confirmed that the electrolyte 21 is sufficiently filled, and also serves to stop the supply of the electrolyte 21. Further, the vent holes 23 provided in the conductive plate 11 of the shallow container-like cathodic protection structure generate gas such as chlorine by electrolysis when the cathodic protection is started, and the electrolyte deteriorates due to the gas. However, it also acts to discharge the gas generated at that time. As the electrolyte, a gel electrolyte such as mortar and bentonite is used.
[0016]
In many cases, the surface of a reinforced concrete structure is not flat, and when a gel-like electrolyte is injected and filled after the shallow container-like cathodic protection structure is attached to the reinforced concrete, it is between the concrete surface and the insulator frame. The electrolyte may leak from the gap. Therefore, it is preferable to form an insulator seal layer made of an elastic body on the insulator frame surface of the shallow shallow container-like anticorrosion structure. The shallow shallow container-shaped anticorrosion structure 13 formed with the insulating seal layer made of the elastic body is a shallow shallow container-shaped anticorrosion structure 13 shown in FIG. The method for attaching the shallow container-like anticorrosion structure 13 shown in FIG. 3 to the reinforced concrete 1 is exactly the same as the method for attaching the shallow container-like anticorrosion structure described in (1) to (3) to the reinforced concrete. Therefore, the description is omitted.
[0017]
In this way, after attaching the shallow container-like cathodic protection structure in a state where the reinforced concrete 1 is filled with the electrolyte 21, the conductive plate 11 is connected to the positive pole of the DC power source E by the electric wire, while the reinforced concrete reinforcing bar 8 is connected. By connecting the negative pole of the direct current power source E to the reinforced concrete, the reinforced concrete 8 can be electrically protected.
When corrosion protection is required for large areas of reinforced concrete, a large number of shallow container-like anticorrosion structures are lined up and attached to the reinforced concrete, and the conductive plate of the bottom-bottom container-like anticorrosion structure is connected by a conductor such as titanium wire. By doing so, it is possible to prevent corrosion of a wide range of reinforced concrete.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
A titanium plate (width: 250 mm x length: 1000 mm x thickness: 0.5 mm) is prepared, an electrolyte inlet having a diameter of 40 mm is formed at the end, and a diameter of 2 mm at the other end facing the electrolyte inlet. The degassing pores were formed.
Further, a platinum-plated titanium wire having a dimension of diameter: 1.5 mm × length: 100 mm is prepared, and platinum plating is further performed on one surface. The thickness is 0.5 mm, the width is 20 mm, and the length is 400 mm. A titanium plate was prepared and bent into a handle to produce an anode part made of a rod-like body and an anode part made of a strip-like body, and these anode parts were joined to the titanium plate by welding to produce a conductive plate. .
[0019]
Furthermore, the outer dimension produced by injection molding of the foamed polyvinyl resin has a width: 250 mm × length: 1000 mm, the inner dimension of the opening has a width: 210 mm × length: 960 mm, and further a thickness: 10 mm. An insulator frame having
An insulator frame is bonded to the conductive plate with an adhesive to produce a shallow container-like anticorrosion structure, and a sponge layer is bonded to the insulator frame of the shallow container-like anticorrosion structure. A hole penetrating both the frame, the conductive plate and the sponge layer was formed along the insulator frame.
[0020]
After selecting the mounting position surface of the shallow container-like anticorrosion structure on the lower surface of the reinforced concrete floor plate outdoors and removing projections, fragile layers, dust, etc. with an electric tool, the holes in the shallow container-like anticorrosion structure A titanium wood screw was inserted into the bottom, and the wood screw was screwed in to attach the bottom shallow container-shaped cathodic protection structure to the lower surface of the reinforced concrete floor board. An insulating washer was inserted into the wood screw so that the wood screw and the conductive plate were kept electrically insulated, and then the wood screw was screwed in and tightened.
[0021]
In this manner, after fixing the shallow container-like anticorrosion structure on the lower surface of the reinforced concrete floor board, the connection tool is screwed into the electrolyte inlet provided in the titanium plate, and the electrolyte injection hose is fitted into this connection tool. When a mortar as an electrolyte was injected by a pump, it was able to be injected into the shallow shallow container-like anticorrosive structure at a pressure as low as about 9.8 KPa. Whether or not the mortar was sufficiently filled was confirmed from the vent holes. After the mortar was sufficiently filled, a conductive plate was connected to the positive pole of the DC power source, and the negative pole was connected to the reinforcing bar to form an anticorrosion circuit. The current flowing through this anticorrosion circuit was adjusted so that a current with a current density of 40 mA / m ² would flow with respect to the area of the reinforced concrete. This current density is the maximum value of the current density necessary for the corrosion protection of reinforcing steel in reinforced concrete. The electrolysis voltage (the voltage between the anode and the reinforcing bar) was 1.8 to 3.0 v, and the voltage varied depending on the influence of temperature, and was high in winter and low in summer, but was almost stable.
[0022]
【The invention's effect】
According to the present invention, the work of attaching the shallow container-like cathodic protection structure injected with the electrolyte to the surface of the reinforced concrete is simple and the conductive plate is separated from the insulator frame and fixed to the surface of the reinforced concrete. However, it is not necessary to complete the work of removing the steel material that protrudes from the surface of the reinforced concrete, the work for preventing short circuit as in the past can be omitted, and the electrolyte can be easily filled, so the skill level High plastering work is no longer necessary, and the construction cost and construction period are greatly reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a shallow shallow container type anticorrosion structure according to the present invention.
FIG. 2 is a partial cross-sectional explanatory view showing a state in which the bottom shallow container-like anticorrosion structure of the present invention is attached to reinforced concrete and an electrolyte is injected.
FIG. 3 is a perspective view of a shallow shallow container type anticorrosion structure according to the present invention.
FIG. 4 is a perspective view of a shallow shallow container-like cathodic protection structure according to the present invention.
FIG. 5 is a perspective view of a shallow shallow container-like cathodic protection structure according to the present invention.
6 is a cross-sectional explanatory view showing a method of injecting an electrolyte into a space formed by the shallow shallow container-like anticorrosive structure and the reinforced concrete surface of FIG. 5 of the present invention.
7 is a cross-sectional explanatory view showing a method of injecting an electrolyte into a space formed by the shallow shallow container-like anticorrosive structure and the reinforced concrete surface of FIG. 5 of the present invention.
8 is a cross-sectional explanatory view showing a method of injecting an electrolyte into the space formed by the shallow shallow container-like anticorrosive structure and the reinforced concrete surface of FIG. 5 of the present invention.
FIG. 9 is a perspective view of an anode portion made of a belt-like body.
FIG. 10 is a partial cross-sectional perspective explanatory view of the shallow shallow container-like cathodic protection structure of the present invention.
FIG. 11 is a partial perspective view showing a conventional reinforced concrete anticorrosion device.
[Explanation of symbols]
1: Reinforced concrete, 2: Joining member, 3: Anode, 4: Support container, 5: Electrolyte, 6: Fence, 7: Hole, 8: Reinforcing bar, 9: Thin reinforcing bar, 10: Insulator frame, 11: Conductive plate 12: hole, 13: shallow shallow container-like anticorrosive structure, 14: anode part, 15: insulating sealing layer, 16: hole, 17: wood screw, 18: insulating washer, 19: electrolyte inlet, 20: Electrolyte injection hose, 21: electrolyte, 22: space, 23: vent hole, 24: connector, 25: slit, 26: slide plate, 27: sponge-like elastic body, 28: plug, 29: coating, 30: Injection nozzle, 31: insulating layer, 32: sill plate, 33: conductor frame, 34: bent edge, 35: cutout, E: DC power supply

Claims (12)

An insulator frame made of an insulating material (hereinafter referred to as an insulator frame), and a corrosion-resistant conductive plate (hereinafter referred to as a conductive plate) attached so as to close an opening on one side of the insulator frame; And further comprising an electrolyte injection port provided in the insulator frame or the conductive plate, and an anode portion attached to the inner side of the conductive plate. Shallow container type anti-corrosion structure. An insulating frame and a corrosion-resistant conductive plate attached so as to close the opening on one side of the insulating frame, and further provided with an electrolyte inlet, and an anode portion is provided inside the conductive plate. A shallow container-like electro-corrosion-proof structure for anti-corrosion of reinforcing steel in a reinforced concrete to be attached, wherein an elastic seal layer made of an elastic body is interposed on the side of the reinforced concrete mounting of the insulator frame facing the conductive plate. A shallow shallow container-like anticorrosion structure for anticorrosion of reinforcing steel in reinforced concrete. An electroconductive plate having corrosion resistance, an electroconductive frame formed by bending a periphery of the electroconductive plate having corrosion resistance, and an insulating layer provided on a reinforced concrete mounting side surface of the electroconductive frame, and an electrolyte injection port Is provided, and an anode part is attached to the inside of the conductive plate having corrosion resistance. A shallow shallow container-like anticorrosion structure for anticorrosion of reinforcing bars in reinforced concrete. The insulating layer provided on the reinforced concrete mounting side surface of the conductor frame according to claim 3 is an insulating elastic body sealing layer made of an insulating elastic body. Container-shaped cathodic protection structure. 5. A shallow shallow container-shaped anticorrosion structure for anticorrosion of reinforcing steel in reinforced concrete according to claim 1, wherein the conductive plate is provided with gas venting pores. 6. The shallow container-like cathodic protection structure for corrosion protection of reinforcing bars in reinforced concrete according to claim 2, wherein the electrolyte injection port is provided on a conductive plate. The electrolyte injection port has a structure in which a cutout port penetrating from the inside to the outside is formed in the insulator frame or the conductor frame, and the cutout port is closed with a contractible elastic body. A shallow shallow container-shaped anticorrosion structure for anticorrosion of the reinforcing bars in the reinforced concrete according to 2, 3, 4 or 5. 4. A shallow container for electrically preventing corrosion of reinforcing bars in reinforced concrete, wherein an elastic seal layer is further adhered on the insulating layer provided on the side of the conductive frame according to claim 3 attached to the reinforced concrete. Anti-corrosion structure. The said anode part consists of a platinum film, a noble metal oxide film, or a carbon film, and coat | covers and attaches this film | membrane to a conductive plate, The 1, 2, 3, 4, 5, 6, A shallow container-like electro-corrosion-proof structure for electro-corrosion-proofing the reinforcing bars in the reinforced concrete according to 7 or 8. The anode part is composed of a coated rod-shaped body or a coated strip-shaped body obtained by coating a platinum film or a noble metal oxide film on the surface of a rod or strip composed of titanium or a titanium alloy, and the coated rod-shaped body or coated strip-shaped body is made conductive. 10. A shallow shallow container-like anticorrosion structure for anticorrosion of reinforcing bars in reinforced concrete according to claim 1, wherein the reinforcing bars are bonded to a plate. A conductive frame having an insulator frame or an insulating layer, and a conductive plate having corrosion resistance attached so as to close one side opening of the conductive frame having the insulator frame or the insulating layer. A shallow shallow container-shaped anticorrosion structure for erosion protection of reinforcing steel in reinforced concrete in which an anode portion is attached to the inside of the reinforced concrete, and the electrolyte plate is provided with an electrolyte injection port in the conductive plate or insulator frame or conductor frame. It is a method of mounting in a state filled with electrolyte,
Install the shallow container-like cathodic protection structure so that the insulator frame or conductor frame is close to the surface of the reinforced concrete, and the conductive plate and anode are located away from the reinforced concrete. The bottom shallow container-like cathodic protection structure is fixed to the surface of the reinforced concrete so that the
Next, an electrolyte is provided in the conductive plate or the insulator frame or the conductor frame in a space formed by the conductive plate and the insulator frame or the conductor frame of the reinforced concrete surface and the shallow shallow container-like anticorrosion structure . A method of attaching a shallow shallow container-shaped anticorrosion structure filled with an electrolyte to reinforced concrete, which is filled by filling from an electrolyte inlet. The method of claim 11 is used to attach the bottom shallow container-shaped anticorrosion structure to the reinforced concrete, fill the electrolyte, then connect the conductive plate to the positive pole of the power source, and connect the reinforcing bar in the reinforced concrete to the negative pole of the power source An anticorrosion method for reinforced concrete using a shallow shallow container-like anticorrosion structure characterized by:

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